Stamping-mill for quartz



WHEELER E HURTAUNG. i

Stamping Mill.

No. 43,248. Patented )une 21,1864.

[n venan'.- Z M N4 PETERS. Prmwmhngnpher. washmgwn. D. C4

UNITED STATES PATENTN OFFICE.

ZENAS WHEELER, OF SAN FRANCISCO, AND O. K. HOTALING, OF GRASS VALLEY,CALIFORNIA.

sTAMP'lNe-MILI. FoP. QUARTZ.

Specification forming part of Letters Patent No. 43,218, dated June .21,1864.

To all whom it may concern:

Be it known that we, ZENAs WHEELER, of San Francisco, in the county ofSan Francisco and State of California, and G. K. HOTALING, of GrassValley, in the county of' Nevada and State of California, have inventedcertain new 'and useful improvements in stamping-mills for reducinggold-bearing quartz to a powder suitable for amalgamating purposes; andwe do hereby declarethat the following is a full, clear and exactdescription of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure 1 isafront elevation of our invention, partly in section; Fig. 2, a sidesectionalview of the same, taken in the line a: x, Fig 1; Fig. 3, ahorizontal section of a portion of the same, taken in the line y y, Fig.1; Fig. 4., a horizontal section of a portion of the same, taken in theline z a, Fig. 2.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates, first, toA a certain means employed for takingthe powder or dust from the mortar-chamber, and conveying it to thedepositchamber, said means consisting of a blast generated by a fan oran equivalent device, arranged in connection with la blast-spout in sucha manner that' the dust will be taken from the mortar-chamber andconveyed to the deposit-chamber and the same blast made to actcontinuously, so as to avoid the admission of fresh external air, andthe consequent mixing of' dirt and Vother light inn` purities held insuspension in the external air with the quartz powder or dust.

The invention relates, second, to the employment or use of a valvearranged in connection with the mortarchamber and blast-spout in such amanner that by regulating or adjusting the valve the quartzmay bereduced to-a greater or less degree of tneness, as desired.

The invention rel ates, third, to an improved mode of securing the diesin the bed of the mortar, whereby said dies are firmly held in positionand very readily adjusted in the mortar-bed and detached therefrom.

rlhe invention relates, fourth, to an improvement in the construction ofthe frame of the mortar, Ywhereby the frame is rendered exl the jars andconcussions caused by the stampi ers in the prosecution of their Work.

To enable those skilled inthe art to fully understand and construct ourinvention, we

-will proceed to describe it.

A represents a cast-iron frame which is composed of posts a, (four moreor less,) secured to a base-plate, B, as follows: The plate B is cast`with sockets b, corresponding in number to the number of posts a, andhaving an internal diameter greater than that of the posts, so that thelatter may be iitted in the former and a space allowed all around thepost between them and the sockets. These spaces are filled with meltedmetal c, (lead will answer.) and a key, d, is driven transverselythrough each socket b and post a. (See more particularly Fig. 3.)

The posts a at their upper parts are con nected by cross-bars or girts ee f, which are cast with swells g, having holes in them to admit of' thecrossbars or girts being dropped down on the posts to rest uponshoulders h, spaces being allowed between the interior of rthe swellsand the posts a, to admit of melted metal being poured in to secure thegirts in proper position; keysalso, if necessary or desired, Imay passthrough the swells g and posts a. By this mode of construction a verystrong and durable v mortar-frame is obtained, one which willeifectually resist the jars and concussions produced by the operation ofthe stampers.

The mortar-box is composed of two horizontal parts,G D. One part, C, iscast with the baseplate B of the mortar-frame A; The other` part, D, iscast separately, and is secured on C 'by means of keys h', which passbetween a stamper guide-bar, t', and uprightsj j on the part D of themortar-box. (See Figs. 1 and 2.) The stamper guide-bar t is permanentlyconnected to the girt f- Y A tight joint is formed between the Atwoparts U D of the mortar-box by havingthe contiguous edges of the samegrooved to receive an india-rubber packing, k. (See Figs. 1, 2, and 4.)j

E represents the stampers, of cylindrical form, and at the lower ends ofrods F, which pass up through. the top of the upper part of' themortar-box and through the guide-bar i.

These stampers are raised by means of wipers of the mortar-box.

I chute.

G, placed on a horizontal rotating shaft, H, in

the upper part of the frame A, said wipers acting upon collars l on therods F, and rotating the rods and stampers as they raise them. Thestampers fall by their own gravity veach time an arm of a wiper passesthe collars l. t

The stampers work over dies I, which are of circular f'orm and securedin the bottom or bed m of the mertanbox, as follows: The bed in has agroovem, made longitudinally in it, and each die I is provided at itslower end with two flanges, o o, which are at opposite points on thedies and of such a length as to admit of Vpassing into the groove a,which has dovetail recesses p made in its sides opposite each die toreceive the flanges o o by turning the dies, (see Fig. 4,) in which theflanges 0;

The dies I are prevented from casuallyy turning, so that their flanges owill not pass lont of the recesses p by having the undcrl surfaces otthe dies I and the bottom of the groove n grooved to receive a rod, q,whichA passes through one side of the lower part, C,

flanges o, consequently, cannot pass out from .the recesses p. The diestherefore will be held in proper position and may be readily removed -atany time by withdrawing the rod q and turning the dies until theirflanges o are out from the recesses p and within the groove m,

as shown in red in Fig. 4, when vthe dies may be lifted from theirworking position. Thus when the dies become worn by use or broken theymay be very readily replaced by new ones. At the front side of the upperpart, D, of

the mortar' box there- 'is a chute, J, through the vsame time the valvevwill readily yield or 'igive, :so as to open when quartz is thrown intothe-'chute J.

; rThechute J may be nearly or quite equal in width to the length of themortar-box, and

the valveK extends the whole length of the This valve prevents dust anddirt heldin suspension in the surrounding air from entering themortar-box, and, as it is'self-adjusting, it requires noparticularattention on f the part of the operators or attendants.

L represents a rotary fan, which is placed in a suitable case, M, whichcommunicates by means ofl one or more pipes, N, with the rear of theupper part, D, of the mortar-box, as

. shown in Fig. 2. The fan-case M also communicates by means of a pipe,O, with-'the lower part of a ctafnber, l?, which we term the depositchamber.7 This chamber extends This rod eifectually pre' vents the diesI from casually turning, and the upward to any suitable height, and withits upper part a spout, Q, communicates, said spout extending forwardover the tcp of the mortar-frame A, and communicating by means of alspout, It, with thc upper part of the chute J. The fan-case M has closedsides, so as not to admit the external air, and at the back of the upperpart, D, of the mortar-box there is a valve, S, which is at a shortdistance from the orifices of the pipes N7 and is capable of beingraised and lowered, so as to regulate the strength of the blast in the.mortar-box, as may be desired; By lowering the valve S the strength ofthe blast from the lower part of the mortar-box up into the pipesN'wil'l beincreased .and diminished by raising said valve.

The deposit-chamber l? is comparatively of large dimensions, very muchlarger than the mortar-box and spouts Q R, as will be seen by referringto Figs. l and 2. The fan L is driven by a belt, T, from a pulley, U,the shaft r of which is driven by a belt, V, from a pulley, NV, on thewiper-shaft H.

The operation is as follows: The wipershaft H is rotated byany'convenient power,

rand the stampers E operated by the wipers G. The quartz is fed into themortar-box through the chute J, and is pulverized by the stam pers onthe dies I. While the stampers are thus performing their work a blast isproduced by the fan L through the mortar-box, fancase M, pipes N O,deposit-chamber I), and spouts Q It, as indicated by the red arrows inFig. 1, and as the quartz becomes sufficiently pulverized in themortar-box it is .drawn up by the blast underneath the valve S, throughthe pipes N, into the fan-case M, and expelled through the pipe O, intothe deposit-chamber l?. This deposit-chainber P, in consequence of beingso much .larger in dimensions than the pipe O and spout Q, has a'`comparatively sluggish blast4 passing through it, and therefore thequartz- -dust when forced into it will not be carried up by the currentinto spout Q, but will gradually settle to the bottom of said chamber,as indicated in red in Fig. 2. This is an essential feature, for withoutit the pulverized quartz would be circulated continuously around throughthe deposit-chamber, blast-spouts, and mortar-box. The valve S is alsoan essential feature of the invention, as by regulating it as describedthe strength of the blast from the lower part of the mortarbox into thepipes N N may be increased or diminished, and consequently the quartzpulverized to a greater or less degree of tineness, as desired. If theblast is strong, it will of course draw up coarser or heavier particlesof quartz into the pipes N than if it were weak. A weak blast allowssaid particles to remain in the mortar-box until f'urther reduced orVcomminuted so that they can be raised by it.

veyed into the depositchamber P without the liability of having any dirtor other foreign impurities mixed with it, as the blast rent through themortar-box, pipes, fancase,

deposit-chamber, and spouts, as described. The pulverized quartz is alsoprevented from being blown out from the machine and around theapartment, and much waste prevented. and the workmen are not compelled(as in the old mode of dry crushing) to inhale the pulverized ores,which soon produces fatal disease in the lungs.

` Having thus described our invention, what we claim as new, anddesireto secure by Letters Patent, is-

1. The combination ot' the fan L M, pipes N O, 'chamber l?, spouts Q R,and mortarbox C D, all constructed and arranged to voperate in themanner and for the purposes specitied.

2. The valve S, arranged in relation to the mortar-box and pipes N,substantially as shown, to regulate the strength of the blast in themortar-box, and consequently the degree of iineness or comminution ofthe quartz as set forth.

3. The securing of the dies I in the bed m of the lower part O of themortar-box by means ot' the anges o o at the lower parts of the dies,the recesses p p at the sides of the groove n, and the wire q, fittingin a groove in the bottoms of the dies and the bed m,

.substantially as described.

4. The combination of the posts a. a, socketed girts e g, shoulders hl1., bed-plate B, sockets b b, soft metalc, and keys d d, allconstructed and arranged, as herein described, to constitute an improvedframe for stamping mills. Y

ZENAS WHEELER. C. K. HOTALING.

Wi tn esses to si gnatureof Zenas Wheeler :4

J F. GREENMAN, R. H. SWITON.

Witnesses to signature of (l. K. Hotaling:

J. F. GREENMAN, R. H. Swi'roN.

